Human nervous and glandular system Notes class 10 notes for see

 Neuron system 

The system of neurons cell which transforms signal from one part of body to brain and brain to different parts of body are called neuron system. 
Neuron cell and it’s parts 
The smallest unit of neuron system is called neuron cell. The parts of neuron cell are, 
cell body: it's round in shape and it's received message. 
axion: It's tube-like structure It helps to increase the speed of messages. 
dendrite: it looked like branches and its main function is transforms Signal. 
 
Types of neuron cell 
Sensory neuron cell: it's transforms signal from different parts of body to brain. (Afferent neuron cell) 
Motor neurons cell: it transforms signal from brain to different parts of body. (Efferent neuron cell) 
interneurons cell: it's process signal inside the brain. (Mixed) 

Brain 

Brain is located inside the skull. The average wight of brain is 1.2KG. Brain is protected by three layers they are; 
Dura Matter, arachnoid matter and Pia matter. There is a cavity between arachnoid matter and pia matter which is called subarachnoid cavity. There is a liquid inside the cavity which is called cerebrospinal fluid. The function of cerebrospinal fluid is: it’s protected from external injury and shock and It’s also help in smooth functioning of brain. The parts of brain are listed down below; 
cerebrum:  This is the largest part of brain. This is responsible for emotion, imagination and etc. and it is called center of memory.     (If any injury happened in cerebrum it can cause coma for life time) 
Cerebellum: this is also called middle brain and this is responsible for body balance and its’s also control our muscle. (If any injury happened in cerebellum, it can cause memory loss and many more) 
Brainstem: this is the smallest part of brain and this is responsible for heart beat rate, blood pressure and many more. (If any injury happened in brainstem, it can cause death) 

Spinal cord and it’s function, 
The small hairlike structure which arises from brain to lower vertical column is called spinal cord. The function of spinal cord is: it’s work in emergency situation. It’s work as a reflex action and it’s connected different part of body to brain. 

Glandular system 

the system of body which produce hormones and enzymes juice is called glandular System. The types of glandular system are;  
Endocrine: the system which produces hormone is called endocrine. They are ductless. 
Exocrine: the system which produces enzyme juice is called exocrine. They are ducted. 
Heterocrine/mixed: the system which produces hormone and enzyme juice both is called mixed gland. 

Pituitary gland; this gland is called master gland because It’s Controle the production of other glands. 
Thyroid gland; Balance of iodine, calcium and make our bone strong. 
Adrenal gland this gland is also called emergency gland because it prepared our body to face EmerGen situation. 
Pancreas; it's also called mixed gland because it’s produced both Harmon. (Glucose-sugar supply)  
(Insulin-maintain sugar level) 
 Gonads; the male and female sex organ is called gonads.